Alkyl multiamine polymer was prepared from polyethylene glycol(PG) modified with ethylenediamine or diethylenetriamine. Structure of the products was identified by IR. The effect of PMAs'addition in the ink-jet coating layer on the speed of ink absorption, definition and the image density was examined. The experimental data show that these three characteristics of the coating layer containing PMA are improved. The product prepared from PG modified with ethylenediamine has a quicker ink aborption speed (1.15s) and better defination(1.013).